<p>This should be a <a href="http://www.example.com/">http://www.example.com/</a> link.
This should be a <a href="mailto:john.doe@example.com">john.doe@example.com</a> link.
As should <a href="mailto:john.doe@example.com">john.doe@example.com</a> this.
As should <a href="mailto:john_doe@example.com">john_doe@example.com</a> this.
As should <a href="mailto:CSS@example.com"><abbr title="Cascading">CSS</abbr>@example.com</a> this.
Another ampersand <a href="http://www.example.com/?doit&amp;x=y">http://www.example.com/?doit&amp;x=y</a> link.
More entities  <a href="http://www.example.com/?doit&amp;x=&quot;y&amp;z=y">http://www.example.com/?doit&amp;x=&quot;y&amp;z=y</a>.</p>

<p>Email international <a href="mailto:übung@macht.den.meister.de">übung@macht.den.meister.de</a>, <a href="mailto:ü.äß@hülse.de">ü.äß@hülse.de</a>
Email invalid: &lt;<a href="mailtos:me@example.com">me@example.com</a>&gt;</p>

<p>Autolink with underscore: <a href="http://www.example.com/with_under_score">http://www.example.com/with_under_score</a></p>

<p><a href="http://www.example.com/">http://www.example.com/</a></p>

